Turn on thread page Beta
 You are Here: Home >< Maths

# Cambridge ENGAA 2016 Paper Help watch

1. Hi guys,

I appreciate that you are all very busy but can anyone help me out with some questions please.

https://www.undergraduate.study.cam....paper_2016.pdf

Question 48:

Im confused by the wording. How can u have two horizontal forces at right angles to each other?

Actual Answer: A

Question 53:

Not a clue. I differentiated and equated to zero to find maxima and minima. Not too sure what to do afterwards.

Actual Answer: C

Thanks in advance

UPDATE: All questions have been answered, thanks @ghostwalker
Posted on the TSR App. Download from Apple or Google Play
2. (Original post by Shaanv)
Hi guys,

I appreciate that you are all very busy but can anyone help me out with some questions please.

https://www.undergraduate.study.cam....paper_2016.pdf

Question 48:

Im confused by the wording. How can u have two horizontal forces at right angles to each other?

Actual Answer: A
One goes North, and one goes East, for example.

Question 53:

Not a clue. I differentiated and equated to zero to find maxima and minima. Not too sure what to do afterwards.

Actual Answer: C

Thanks in advance
Do a rough sketch, plotting the turning points - and off to infinities.

Your k values will equate to horizontal lines at y=k, and need to cut the graph at 4 points.
3. (Original post by ghostwalker)
Do a rough sketch, plotting the turning points.
The question says two horizontal forces at right angles to each other. If one is horizontal and the other is perpendicular to it surely the force is vertical.

Also is there meant to be an attachment
Posted on the TSR App. Download from Apple or Google Play
4. (Original post by Shaanv)
The question says two horizontal forces at right angles to each other. If one is horizontal and the other is perpendicular to it surely the force is vertical.

Also is there meant to be an attachment
You only seem to have looked at the last part of my post.

No attachement on my part.
5. (Original post by ghostwalker)
You only seem to have looked at the last part of my post.

No attachement on my part.

Would this be the correct way to tackle the problem, i dont get an even answer of 5 but it rounds to 5?
Posted on the TSR App. Download from Apple or Google Play
6. Shaanv

Seems to be something wrong with the thread, or my machine, as I can't quote you.

You've drawn the weight on the same line as one of the forces, which isn't correct.

As seen from above - see my diagram. The weight will be in the third dimension going into the page/image.

Work out the resultant of the two forces. This determines the direction of motion. Friction will then oppose that motion - along the same line, but in the opposite direction. Work out the final resultant force, and....

7. (Original post by ghostwalker)
Shaanv

Seems to be something wrong with the thread, or my machine, as I can't quote you.

You've drawn the weight on the same line as one of the forces, which isn't correct.

As seen from above - see my diagram. The weight will be in the third dimension going into the page/image.

Work out the resultant of the two forces. This determines the direction of motion. Friction will then oppose that motion - along the same line, but in the opposite direction. Work out the final resultant force, and....

Much appreciated. I only considered a vertical plane which was wrong.

I wont be making that mistake again.
Posted on the TSR App. Download from Apple or Google Play

Reply
Submit reply
Turn on thread page Beta

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 26, 2017
Today on TSR

### Results day under a month away

How are you feeling?

Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.